Electric spot-welding machine.



W. C. WINFIELD & A. G. TAYLOR.

ELECTRIC SPOT WELDING MAGHINE.

APPLIUATION IILED SEPT. 18,1911.

1,063,097. Patented May 27,1 13,

3 BHBETSSHE BT 1.

W. C. WINFIELD 8a A. C. TAYLOR.

ELECTRIC SPOT WELDING MACHINE. APPLICATION- FILED SEPT.18,1911,

1,063,G9'7 Patented May 2?, 1913.

fl rt/5' 'r W. G. WINPIELD & A. O. TAYLOR.

ELECTRIC SPOT WELDING MACHINE.

APPLIOATION FILED SEPT.18,1911.

1,063,097. Patented May 27,1913.

3 SKEETS-SHEET 3.

UNITED STATES WILLIAM C. WINFIELD AND ALBERTIS C. TAYLOR, 0J5 WARREN, QHID, ASSIGEORS TO THE WINFIELD ELECTRIC WELDING MACHINE 00., Q WARIFEN, GHIO, A. 170E263- BATION.

A J5.pplication filed September is, item.

ehines of which the following is a specifica tion. 1:

"Thisinvention relates to improvements in electric. spotwvelding machines, and the im proveinents reside more particularly in the point-holders and welding-points for such machines, all substantially as herein shown and described and more particularly pointed out in the claims.

In Welding superimposed sheets or pieces of metal together, a spot-welding machine is'often called upon to produce Welds in corners or other places where the room is limited or restricted. In this event it is either difficult or impossible to use'aXially-opposed and parallelly-alined contact pins or weld ing-points.

Our object, therefore, is'to pr side holds ers particularly constructed to s .pport the welding-points in angular relations to produce welds in what may be regarded otherwise inaccessible places.

A further object is to provi e means 1 permit optional use of eithe;v parallell alined or angularlyrelated welding-points in the same machine.

A further object is to provide detachable water-circulating connections for the point holders adapting extension of the watercirculating system to the auxiliary point holders.

Other objects are embodied in other details of construction as hereinafter more particularly set forth.

In the accompanying drawings, Figure 1 is a side elevation and part sectional view of an electric welding machine embodying our improvements. Fig. 2, Sheet 2, is a sectional view on vertical lines of the upper and lower point-holders, but on a larger scale than as shown in Fig. 1. Fig. 3 is a horizontal section in plan of the upper point-holder on line 33, Fig. 2. .Fig'. 4; is a sectional View in plan of the lower pointholder on line l.l-, Fig. 2. Fig. 5 is a side view of the main point-holders equipped "for clamping a pair ofweldingpoints in straight alinement.

Specification of Letters Patent.

ELECTRIC SPQT WELZBING MAGTEEINE.

Patented may .1913.

Serial 1 m. stones.

A short/n, the welding machine comprises a base 2 having an extended copper bar 3 and an overhanging arm 4, each serviug'to support separate point -holders 5 and 6. re spectively,the first being detaehably fixed bar 3 by screws or bolts 7, and the second "being removably secured on. a movable head 8 by bolts 9. As a matter of fact, head 8 and the outer end of bar 3 are particularly constructed to serve as the main pointholde'rs, having straight alined openings and recesses 10 and 11 respectively, see Fig. 5 to receive separate Welding" pins li2--hereiu otherwise briefly. referred to as points. As

thus used, the said points. are fastened in place'by clamps 14:, see Fig. 5, but when an angular relation of two Welding points is required, the clamps 1% are substituted by holders and 6, which are made to fit upoii the same seats for the clamps and are tened by bolts entering the same screw openings in head 8 and bar 3. Head 8 has a stem 15 slidably mounted in a rotatable sleeve 16 in arm i, and a pressureapplying lever 17 is connected. with stem 15 to raise and lower the head. Water is circulated through head 8 by pipes 18., or through auxiliary holder (3 by pipes 19. when attachment with either set of pipesis made by rubber hose 20 leading to other pipes 21 in the line of supply, and these supply pipes include tubes 22 haying flexible connections 23, comprising rubber hose adapted to con nect with either of the projecting pipes Qel 0125 in bar 8 and lower point-holder 5, respectively, see Figs. 1 and 5. electrically connected with a transformer 26 at the top of base 2 by one or more copper cables 27, and bar 3 is also connected with said transformer, but insulated from top plate 18 on the base.

Now referring to point holders 5 and G in detail, the upper.point-holder (:3 comprises a block of copper having a lug 29 at its top to abut against the outer end-face of head 8. and its outer enddiace has a semicircular groove 30 vertically therein to match a corresponding groove 31' in clamp 32 to hold the upper welding point 12 in true vertical alinement clamping being ef fected by bolts 9 which also fasten point holder 6 on head 8. Pipes 19 enter pointholder 6 at the rear at either side and open into a cross-bore 32 which is closed by plugs at its ends, said bore being closely related to the welding-point l to permit water cooling thereof. The bottom end taco of weldingpoint 12 is fiat and at right angles to the longitudinal. axis thereof so as to bear uni- "forxnlyon the upper plate P, which represents a portion of the article being welded. The lower plate P represents another part or" the article, and as shown comprises an inclined wall 33 having a flange 34. The angular corner and inclined wall. restrict welding operations or make welding; impossible with two straight axially-aimed welding-points, and therefore, point-holder 5 is particularly constructed with a split extension 35 an inclined opening between its split portions adepted'to clamp lower point 13 adjustably therein, clamping being efiect-ed by transverse bolt or screw 36. The end-face of extension 35 is also inclined or cut away to allow welding to talieplace under restrictions substantially as. shown. Constructively, lower point 13 has a welding end 37, oi ungnlate formation, the oblique plane or face thereof being brought to a horizontal plane directly oppo site the welding end of the upper point 12 by adjustment of the points in their respective holders. Point-holder 5 and point 13 are kept cool by circulation of water in the two bores 38 formed in extension 35, the rearwardly projecting pipes 9.5 serving inlet and outlet pipes and communication between the bores being obtained by a U- shaped pipe 39. connecting the rear ends and extending to the front ends of said bores.

What we claim is:

1. In a spot-welding machine, a vertically,- movable point-holderand a fixed pointholder, each having'water circulating devices in combination with a set of auxiliary point-holders reniovably mounted on said movable and fixed point-holders and having water-circulating devices of their own, and water supply connections for said machine having detachable attachment with the water-circulating devices of either set of pointholders.

2. In a spot-welding machine, a set of main point-holders having water-circulating passages and a set of auxiliary pointholders having water-circulating channels, in combination with water supply pipes hav-- ing connections adapted to detachably unite with elther of said po1nt-holders.

3. In a spot--welding machine, a set of oppositely-mounted main poinonolders hav ing water supply tubes detachably connect ed therewith, in combination with a set of auxiliary point-holders having separate water-circulating means adapted to connect with said supply tubes, and means to detachably secure said auxiliary point -holders upon said main point-holders.

4:. in a spot-welding; machine, a pointholder having water inlet and outlet pipes extending therefrom, in combination with an auxiliary poin'hholder having water inlet and outlet pipes extending therefrom and a set of water-supply tubes having detachable connection withsaid pipes.

5. in a spot-welding machine, a set of auxiliary point-holders. each having projecting water inlet and outlet pipes, in combination with detachable-water-supply connections for said pipes.

6. In a spot-welding machine, a pair of oppositely mounted point-holders and separate welding points secured in said holders in angularly-alined relations, the lower point being inclined and the upper point vertical, and said points provided with welding end faces lying oppositely in parallel planes.

7. In a spot-welding machine, a pointholder and a weldingpoint supported thereby. in combination with a second weldingpoint mounted at an inclination to said first named pointand having a welding end-face in an oblique plane to its longitudinal axis, and the upper of said welding points being movable and pressure applying means adapted to bear thereon.

8. In aspot-welding machine, a pointholder comprising a metal block having ,a seat for a welding-point disposed-at an in clination to a vertical plane, a Welding-point therein and means to secure said pointed- .justably in said seat. a

In testimony whereof we aliix our signs. tures in presence of two witnesses. WILLIAM C. lVlNFlELDQ ALBERTES C. TAYLQB.

Witnesses:

HELEN Benoit, A. E, Wonnnns. 

